From Chapter 2:
Queen Elizabeth's Secretary of State, Sir Robert Cecil, would appear to have been a smoker. In a letter addressed to him, John Watts, an alderman of London, wrote: "According to your request, I have sent the greatest part of my store of tobaca by the bearer, wishing that the same may be to your good liking. But this tobaca I have had this six months, which was such as my son brought home, but since that time I have had none. At this period there is none that is good to be had for money. Wishing you to make store thereof, for I do not know where to have the like, I have sent you of two sorts. Mincing Lane, 12 Dec. 1600."

From Chapter Chapter 8:
He describes the box and its contents in lines which show not only tolerance but appreciation of tobacco, from which it is not unreasonable to infer that Cowper's first view of his friend's smoking-habit as a drawback—as shown in his letter to Unwin, quoted above—had been modified by neighbourhood and custom. It might have been well for the poet himself if he had learned to smoke a social pipe with his friend Bull. The appreciative lines run thus:

This oval box well filled
With best tobacco, finely milled,
Beats all Anticyra's pretences
To disengage the encumbered senses.
O Nymph of transatlantic fame,
Where'er thine haunt, whate'er thy name,
Whether reposing on the side
Of Oronoco's spacious tide,
Or listening with delight not small
To Niagara's distant fall,
'Tis thine to cherish and to feed
The pungent nose-refreshing weed,
Which, whether pulverized it gain
A speedy passage to the brain,
Or whether, touched with fire, it rise
In circling eddies to the skies,
Does thought more quicken and refine
Than all the breath of all the Nine—
Forgive the bard, if bard he be,
Who once too wantonly made free,
To touch with a satiric wipe
That symbol of thy power, the pipe;
        *     *     *     *     *     *     *
And so may smoke-inhaling Bull
Be always filling, never full.